Hydraulic air-compressor.



No. 821,607. PATENTED MAY 29, 1906. I'. G. GARR.

HYDRAULIC AIR COMPRESSOR.

APPLIGATION FILED APR.15, 1905. l

2 SHEETS-SHEET 1y 5 e' f; l.. l 5E M mlm w. 6 g Ink all No. 821,607. PATBNTBD MAY 29, 1906. n

E'. C. GARR.

HYDRAULG AIRUOMPRESSOR.

APPLICATION FILED A PR.15,1905.

2 SHEETS--SHEBT 2 IINITED STATES PATENT OFF ICE.

FRANK C. CARR, OF SIMSBURY, CONNECTICUT.

HYDRAULIC AIR-COM PRESSOR.

' Specification of Letters Patent.

ratenteo. May 29, 1906.

Application filed April J 1905. Serial No. 255,686.

` charged with air and with 'water alternately.

cordance with those principles.

It is the object ofthe invention to produce in air-compressors of this class a vigorous and reliable self-control. To accomplish this object, I use an oscillating valve-governor operated by a pair of water-buckets,

which are filled and emptied automatically,.

and by a shifting load which is carried by such oscillating governor.

In the accompanying drawings, which illustrate the best manner in which I have contemplated applying the principles of my invention, Figure 1 is a front elevation of a hydraulic air-compressor constructed in ac- Fig. 2 is a horizontal section on line x x of Fig. 1'. Fig. 3 is an enlarged horizontal section ofthe cock which directs the water-supply. Fig. 4 is an end elevation of the oscillating governor and its attachments.

In Figs. 1 and 2 the numerals 1 and 1 denote two compression-tanks, duplicates of each other, standing side by side on base 2, which is supported by legs 3. These tanks have water-inlets 4 and 4, water-outlets 5 and 5 waste-pipes 28 and 28, air-inlets 6 and 6 air-outlets 7 and 7 and subsidiary valve-outlets 25 and 25. The water-inlets 4 and 4 are guarded by a two-way cock 8, which is located in the supply-pipe and is described below. The water-outlets 5.and 5 are provided with valves 9 and 9 the air-inlets 6 and 6 with hinged vaves 10 and 10, and the air-outlets 7 and 7 with valves which are not shown in the drawings. Cock 8 (shown in Figs. 1, 2, and 3) is located at the junction of the main supply-pipe 11 with its two branches 12 and 12. It has a cylindrical chamber 14, an incompletely-cylindrical movable member 15 therein, and a stem 16 for operating that member by torsion, and is adapted to divert the water-supply from either of those branches to the other of them without stopping the iiow of water from pipe 11. As a means of operating this valve stem 16 is provided with a lever-arm 17.

yThe valves 9 and 9 (shown in Figs. 1 and 2) are disks having apertures 18 and 18, lrespectively, and are seated upon the stationary disks 19 and 19 which have registering apertures 20 and 20. These' valves have hollow cylindrical stems 21 and 21, which are made fast to their respective valves by set-screws 23 and 23. These stems extend axially through the middle of the tanks,A respectively, and are provided with external levers or rock-arms 24 and 24. The same cylindrical stems have openings 25 and 25 within the tanks and are provided with sleeves 26 ,and 26, carrying floats 27 and 27 respectively, and with those sleeves form outlet water-valves.

The waste-pipes 28 and 28, leading from the tanks, are provided with cocks 29 and 29 and discharge into pivoted and counterbalanced receptacles 30'and 30, which are connected by links 31 and 31 with counterbalanced levers 32 and 32 controlling the inletvalves 10 and 10.

The lever-arms 24, 17, and 24 are severally pinned to a connecting rod or link 46, by which they may be 'operated in unison. A hanger 33 under'base 2 supports upon a single axle a grooved pulley 34 and a teetering lframe 35, which can rock in unison only. In

this frame two swinging buckets 36 and 36 are pivoted below the hollow valve-Steins 21 and 21', respectively. These buckets have exit-valves 37 and 37 provided with stems 38 and 38 which are adapted to encounter stops 39 and 39. To the same Jframe 35 and near its opposite ends, respectively, are attached two swinging dash-cups 40 and 40 by their stems 47 and 47 These dash-cups have air holes or vents 41 and 41. By a slack rope 42 which is attached to the lower part of pulley 34 and to the opposite end portions of link 46 motion may be transmitted from frame 35 to that reciprocable link. On the same pivoted frame 35 is mounted the oscillating governor, which consists of a metallic cylinder or other elongated and closed receptacle 43, partly iilled with water or other shifting load 44, which will at all times promptly run to that portion of said cylinder which for the time being is tilted down. y l

Other particulars of construction will be perceived Jfrom the drawings and from the mode of operation, which now remains to be described.

Figs. 1 and 2 show the situation at the mo- IOO IOS g n ment when the rising water 13 in tank 1 has lifted ioat 27 and its sleeve 26 so high as to uncover the opening 25 in the valve-stem 21 and has thereby opened its way to run out slowly at the lower end of that stem. At this moment cock 8 is open toward inlet 4, but is closed toward inlet 4, while the Water-valve 9 `and the air -inlet 6 are closed, and the unseen valve at airoutlet 7 is open, but at the point of closing. At thesame moment tank 1 is empty of Water, its water-valve 9 is open, its valve-opening 25 is closed by sleeve 26, and its air-inlet 6 and air-outlet 7 are closed. At the same time the pivoted frame 35 occupies the tipped position indicated in Fig. 1, the swinging buckets 36 and 36 are empty, and the shifting load 44 in cylinder 43 occupies the lower end portion of that cylinder. In this position of aifairs water runs from tank 1, through stem 21, into bucket 36, and Weighs down that bucket and its connected dash-cup till that cup strikes the waste water below, and valve-stem 38 encounters the stop 39. Thereby the position of the pivoted frame 35 is reversed, cylinder 43 is tilted to an opposite inclined position, (not shown in the drawings) and valve 37 is opened. During the described reversal of cylinder 43 the water 44 runs across to the newlylowered end portion of that cylinder and both' by weight and by momentum reinforces the vigor of that reversal. vigorous movement of the governor being shared by pulley 34 and thence communicated by slack rope 42 to link 46 takes effect vupon lever-arms 24, 17, and 24 with a jerk as soon as the slackness of that rope has been taken up. By the movement of these lever-arms valve 9 is closed, valve 9 is opened, and cock 8, without producing any hammering effect in the supply-pipe 11 is opened toward tank This reinforced and 1 and closed toward tank 1. Thereupon tank 1 empties itself of water through valve 9 and waste-pipe 28 and fills itself with air through inlet 6, whose valve .10 is opened by the weight of waste water caught in pan 30', while float 27 and sleeve 26 subside, closing the outlet 25 in valve-stem 21. While this is taking place in tank l tank 1 Jfills itself with water admitted at inlet 4 and discharges air driven out under pressure at outlet 7. Meanwhile bucket 36 empties itself, while by the gradual rising of iioat 27 and sleeve 26 the opening 25 in stem 21 is uncovered with a view to the filling of bucket 36. Thereupon the same operations that are above described as occurring in connection with tank 1 are now repeated with reference to tank, l, and in like manner the governing mechanism is by reversal restored to its original position, (indicated in Figs. 1 and 2,) and by successive repetitions of these operations the compressed air is pumped out of the tanks at the outlets 7 and 7 alternately.

Such being the construction and operation of this improved air-compresser, I claim as my invention- In a twin-cylinder air-compressor, a pair of outlet water-valves and a two-way supplycock, provided each with a torsional stem, having a lever-arm, which is pinned to a common reciprocable rod, in combination with an oscillating governor, which carries a shifting load, and is connected with said reciprocable rod by means of a pulley and a slack rope.

In testimony whereof T hereunto set my name in the presence of two witnesses.

FRANK C. CARR. 

